Bonds



(No Model.) G. W. BONDS.

FRICTION CLUTCH.

' Patented Mar. 3, 1885.

3 5 cured to one side.

ilrirTnn STATES Trice.

PATENT GEORGE XVASHINGTON BONDS, OF SAN FRANCISCO, CALIFORNIA, ASSIGNORTO BYRON JACKSON, OF SAME PLACE.

FRICTION-CLUTCH.

SPECIFICATION forming part of Letters Patent No. 313,284, dated March 3,1885.

Application filed August .29, 1884. (No model.)

To all whom it may concern:

Be it known that I, GEORGE W. Bones, of the city and county of SanFrancisco, and State of California, have invented an Improve- 5 ment inFriction-Clutches; andI hereby declare the following to be a full,clear, and exact description thereof.

My invention relates to afriction-cluteh for hoisting-drums,pulley-shaft couplings, &c.,

IQ and it is more especially applicable to what are known aswagon-derricks, in which winding-drums are employed for operatingderrick-forks.

It consists in a means for applying the clutching device so that thestrain is applied without any pressure upon the journals, and in certaindetails of construction, all of which will be more fully explained byreference to the accompanying drawings, in which Figure 1 is a verticallongitudinal section taken through the axis of the drum. Fig. 2 is atransverse section showing the clutch mechanism. Fig. 3 is a plan viewof the drums and horizontal section of the clutch.

Figs. 4, 5, 6, 7, 8, and 9 are details of the several parts of theclutch.

A is a frame-work, upon which, in the present case, I have shown thejournal-boxes B supported. The shaft 0 may'turn in these journal-boxes,and the drums D are loosely supported upon this shaft. Between thesedrums is a friction-wheel, E, which may be keyed to the shaft 0, or itmay run loosely thereon, and has a beveled gear-wheel, E, se-

Abeveled pinion, F, fixed to the shaft G, meshes with the gear E, so asto drive and rotate it. This shaft G is driven by a pulley, H, or othersuitable device, and the wheel or drum E is thus driven from its 40periphery and not from the shaft 0.

To the heads of the drums D which are ad jacent to the pulley E arehinged two castings, I, having friction-blocks K, which may be madeeither of wood or metal, secured to 5 them. The hingepins l of thesecastings are near one side of the circumference, while the opposite endsextend nearly to the other side, and are driven toward each. other by aspiral or other spring, L, which tends to keep the friction-blocks K outof contact with the interior periphery of the Wheel or rim E. Lugs aproject from the inner sides of the castings I at points upon theopposite side of the shaft 0 from the hinge-pins I, and these lugs havetheir faces inclined, so that awedge-shaped 5 block, M, may fit andslide between them. This block has an extension from its smaller end,which passes out through the head of the drum D, and is connected withthe sliding collar N, so that it may be moved to or from the end of thedrum.

0 is a clutch-lever connected with this collar and having its fulcrumupon the support I, which may be secured to the box or other suitablepoint.

The operation will then be as follows. When the wedge block M is pushedinward, the spring L will draw the free ends of the castings I towardeach other, so as to hold the frictional blocks K out of contact withthe inte- 7o rior of the drum E; but when it is desired to have the drumrotate, the lever O is moved so as to draw the wedge-block M between thelugs a, and by pressing these lugs and the casting I outward it forcesthe blocks K against the interior of the rim E, so that the frictionwill be sufficient to set the drum in motion and cause it to revolve,thus winding the rope upon it as long as may be desired. By moving thelever O in the opposite direction the wedge M is forced back and thefrictional blocks released, when the drum will stop.

Each of the drums D has a similar device for operating it, so thateither one or both may be operated.

The drums may be supplied with the usual brake straps and levers forholding them at any point and suspending the load or for easing it back;or the clutch-lever alone may be used in the case of light loads. 0

An important feature of myinvention is the driving of the intermediatefriction-wheel, E, from the periphery and independently of the shaft C,so that the latter may turn with it; or. it may be fixed and the wheeland drums both 5 turn upon it.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is 1 1. In ahoisting apparatus, the shafthaving 1c0 the wheel or rim upon it, a winding-drum turning loosely uponthe shaft and having frictional blocks upon the opposite sides of theshaft, together with a wedge which may be drawn between these blocks, soas to force them outward into contact with the rim, substantially asherein described.

2. In a hoisting apparatus, the windingdruin turning loosely upon theshaft,with one end adjacent to a wheel which is upon said shaft,friction-blocks hungupon the end of the drum, so that their faces are inproximity with the interior of the wheel-rim, and a wedge which may bemoved between these frictionblocks or their supporting-hangers, togetherwith an operating-lever and collar, substantially as herein described.

3. In a hoisting apparatus, therope-wind ing drums, with an intermediatefriction-wheel mounted upon a shaft and a peripheral gear upon thefriction-wheel, by which the latter is driven, substantially asdescribed.

4. In a friction-clutch, awheel or rim upon the shaft and havingsuitable driving-gear, a drum or driims turning loosely upon said shaftand having one end adjacent to the wheel, friction blocks or shoessupported upon the end of the drum, so that their faces may be forcedoutward against the rim of the wheel, a wedge-shaped block movingbetween these shoes or their supports, together with an actuating-lever,by which it may be moved, and the retracting-spring L, substantially asherein described.

In witness whereof I have hereunto set my hand.

GEORGE WASHINGTON BONDS.

Vitnesses:

S. H. NOURSE, H. (3. LEE.

